#include <Arduino.h>

void shiftArray(uint8_t *a)
{
  uint8_t temp, temp_scalar[32], carry = 0;
  uint8_t current_bit[32] = {0};

  memcpy(temp_scalar, a, 32);
  for (int i = 255; i >=0 ; i--)
  {
    memcpy(a, temp_scalar, 32);
    for (int k = i; k >=1 ; k--)
    {
      carry = 0;
      for (int j = 31; j >= 0; j--)
      {
        temp = a[j];
        a[j] = (carry << 7) | (a[j] >> 1);
        carry = temp;
      }
    }

    current_bit[0] = a[0] & 0x01;

    Serial.print("current_bit =");
    for (int j = 31; j >= 0; j--)
    {
      Serial.print(current_bit[j], BIN);
      Serial.print(" ");
    }
    Serial.println(" ");
  }
}

void setup() {
  Serial.begin(9600);
  uint8_t a[32] = {0};
  a[0] = 5;
  a[31] = 255;

  Serial.print("a before the shifting =");
  for (int i = 31; i >= 0; i--) 
  {
    Serial.print(a[i], BIN);
    Serial.print(" ");
  }
  Serial.println();

  shiftArray(a);

  Serial.print("a After the shifting =");
  for (int i = 31; i >=0; i--)
  {
    Serial.print(a[i], HEX);
    Serial.print(" ");
  }
  Serial.println();
}

void loop()
{
  // Nothing to do here
}